CVE-2021-39309 : Exploit Details and Defense Strategies

This CVE-2021-39309 article provides details about a vulnerability in the Parsian Bank Gateway for Woocommerce WordPress plugin.

Understanding CVE-2021-39309

CVE-2021-39309 is a vulnerability in the Parsian Bank Gateway for Woocommerce WordPress plugin that allows for Reflected Cross-Site Scripting (XSS) attacks.

What is CVE-2021-39309?

The vulnerability in the Parsian Bank Gateway for Woocommerce WordPress plugin enables attackers to inject arbitrary web scripts through the 'and' parameter due to a var_dump() on $_POST variables.

The Impact of CVE-2021-39309

The impact of CVE-2021-39309 is rated as MEDIUM with a CVSS base score of 6.1. It requires user interaction for exploitation and has low impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-39309

This section provides technical details about the CVE-2021-39309 vulnerability.

Vulnerability Description

The vulnerability allows for Reflected Cross-Site Scripting (XSS) attacks via the 'and' parameter in the Parsian Bank Gateway for Woocommerce WordPress plugin up to version 1.0.

Affected Systems and Versions

Product: Parsian Bank Gateway for Woocommerce
Vendor: Parsian Bank Gateway for Woocommerce
Versions Affected: <= 1.0

Exploitation Mechanism

The vulnerability arises from a var_dump() on $_POST variables in the ~/vendor/dpsoft/parsian-payment/sample/rollback-payment.php file.

Mitigation and Prevention

Protecting systems from CVE-2021-39309 involves the following steps:

Immediate Steps to Take

Uninstall the Parsian Bank Gateway for Woocommerce WordPress plugin.

Long-Term Security Practices

Regularly update all plugins and themes.
Implement input validation to prevent XSS attacks.

Patching and Updates

Ensure that all software components, including plugins, are up to date to mitigate the risk of XSS vulnerabilities.